Stray comment, probably copy & pasted from audio_encode_example().
[libav.git] / libavformat / rtsp.c
CommitLineData
1617ad97 1/*
93ced3e8 2 * RTSP/SDP client
1617ad97
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3 * Copyright (c) 2002 Fabrice Bellard.
4 *
b78e7197
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5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
1617ad97 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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20 */
21#include "avformat.h"
22
438fcb75 23#include <unistd.h> /* for select() prototype */
42572ef5 24#include "network.h"
1617ad97 25
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26#include "rtp_internal.h"
27
1617ad97 28//#define DEBUG
b6892136 29//#define DEBUG_RTP_TCP
1617ad97 30
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31enum RTSPClientState {
32 RTSP_STATE_IDLE,
33 RTSP_STATE_PLAYING,
34 RTSP_STATE_PAUSED,
35};
36
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37typedef struct RTSPState {
38 URLContext *rtsp_hd; /* RTSP TCP connexion handle */
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39 int nb_rtsp_streams;
40 struct RTSPStream **rtsp_streams;
115329f1 41
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42 enum RTSPClientState state;
43 int64_t seek_timestamp;
115329f1 44
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45 /* XXX: currently we use unbuffered input */
46 // ByteIOContext rtsp_gb;
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47 int seq; /* RTSP command sequence number */
48 char session_id[512];
49 enum RTSPProtocol protocol;
50 char last_reply[2048]; /* XXX: allocate ? */
8b1ab7bf 51 RTPDemuxContext *cur_rtp;
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52} RTSPState;
53
54typedef struct RTSPStream {
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55 URLContext *rtp_handle; /* RTP stream handle */
56 RTPDemuxContext *rtp_ctx; /* RTP parse context */
115329f1 57
8b1ab7bf 58 int stream_index; /* corresponding stream index, if any. -1 if none (MPEG2TS case) */
1617ad97 59 int interleaved_min, interleaved_max; /* interleave ids, if TCP transport */
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60 char control_url[1024]; /* url for this stream (from SDP) */
61
62 int sdp_port; /* port (from SDP content - not used in RTSP) */
63 struct in_addr sdp_ip; /* IP address (from SDP content - not used in RTSP) */
64 int sdp_ttl; /* IP TTL (from SDP content - not used in RTSP) */
65 int sdp_payload_type; /* payload type - only used in SDP */
d1ccf0e0 66 rtp_payload_data_t rtp_payload_data; /* rtp payload parsing infos from SDP */
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67
68 RTPDynamicProtocolHandler *dynamic_handler; ///< Only valid if it's a dynamic protocol. (This is the handler structure)
69 void *dynamic_protocol_context; ///< Only valid if it's a dynamic protocol. (This is any private data associated with the dynamic protocol)
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70} RTSPStream;
71
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72static int rtsp_read_play(AVFormatContext *s);
73
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74/* XXX: currently, the only way to change the protocols consists in
75 changing this variable */
1617ad97 76
d1ccf0e0 77int rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_UDP);
85fb7b34 78
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79FFRTSPCallback *ff_rtsp_callback = NULL;
80
81static int rtsp_probe(AVProbeData *p)
82{
83 if (strstart(p->filename, "rtsp:", NULL))
84 return AVPROBE_SCORE_MAX;
85 return 0;
86}
87
88static int redir_isspace(int c)
89{
90 return (c == ' ' || c == '\t' || c == '\n' || c == '\r');
91}
92
93static void skip_spaces(const char **pp)
94{
95 const char *p;
96 p = *pp;
97 while (redir_isspace(*p))
98 p++;
99 *pp = p;
100}
101
115329f1 102static void get_word_sep(char *buf, int buf_size, const char *sep,
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103 const char **pp)
104{
105 const char *p;
106 char *q;
107
108 p = *pp;
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109 if (*p == '/')
110 p++;
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111 skip_spaces(&p);
112 q = buf;
113 while (!strchr(sep, *p) && *p != '\0') {
114 if ((q - buf) < buf_size - 1)
115 *q++ = *p;
116 p++;
117 }
118 if (buf_size > 0)
119 *q = '\0';
120 *pp = p;
121}
122
123static void get_word(char *buf, int buf_size, const char **pp)
124{
125 const char *p;
126 char *q;
127
128 p = *pp;
129 skip_spaces(&p);
130 q = buf;
131 while (!redir_isspace(*p) && *p != '\0') {
132 if ((q - buf) < buf_size - 1)
133 *q++ = *p;
134 p++;
135 }
136 if (buf_size > 0)
137 *q = '\0';
138 *pp = p;
139}
140
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141/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
142 params>] */
4934884a 143static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
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144{
145 char buf[256];
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146 int i;
147 AVCodec *c;
7b49ce2e 148 const char *c_name;
93ced3e8 149
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150 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
151 see if we can handle this kind of payload */
93ced3e8 152 get_word_sep(buf, sizeof(buf), "/", &p);
d1ccf0e0 153 if (payload_type >= RTP_PT_PRIVATE) {
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154 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
155 while(handler) {
156 if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
157 codec->codec_id = handler->codec_id;
158 rtsp_st->dynamic_handler= handler;
159 if(handler->open) {
160 rtsp_st->dynamic_protocol_context= handler->open();
161 }
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162 break;
163 }
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164 handler= handler->next;
165 }
93ced3e8 166 } else {
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167 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
168 /* search into AVRtpPayloadTypes[] */
169 for (i = 0; AVRtpPayloadTypes[i].pt >= 0; ++i)
170 if (!strcmp(buf, AVRtpPayloadTypes[i].enc_name) && (codec->codec_type == AVRtpPayloadTypes[i].codec_type)){
171 codec->codec_id = AVRtpPayloadTypes[i].codec_id;
172 break;
173 }
174 }
175
176 c = avcodec_find_decoder(codec->codec_id);
177 if (c && c->name)
7b49ce2e 178 c_name = c->name;
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179 else
180 c_name = (char *)NULL;
181
182 if (c_name) {
183 get_word_sep(buf, sizeof(buf), "/", &p);
184 i = atoi(buf);
185 switch (codec->codec_type) {
186 case CODEC_TYPE_AUDIO:
187 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
188 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
189 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
190 if (i > 0) {
191 codec->sample_rate = i;
192 get_word_sep(buf, sizeof(buf), "/", &p);
193 i = atoi(buf);
194 if (i > 0)
195 codec->channels = i;
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196 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
197 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
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198 }
199 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
200 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
201 break;
202 case CODEC_TYPE_VIDEO:
203 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
204 break;
205 default:
206 break;
207 }
208 return 0;
93ced3e8 209 }
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210
211 return -1;
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212}
213
214/* return the length and optionnaly the data */
215static int hex_to_data(uint8_t *data, const char *p)
216{
217 int c, len, v;
218
219 len = 0;
220 v = 1;
221 for(;;) {
222 skip_spaces(&p);
223 if (p == '\0')
224 break;
225 c = toupper((unsigned char)*p++);
226 if (c >= '0' && c <= '9')
227 c = c - '0';
228 else if (c >= 'A' && c <= 'F')
229 c = c - 'A' + 10;
230 else
231 break;
232 v = (v << 4) | c;
233 if (v & 0x100) {
234 if (data)
235 data[len] = v;
236 len++;
237 v = 1;
238 }
239 }
240 return len;
241}
242
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243static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
244{
245 switch (codec->codec_id) {
246 case CODEC_ID_MPEG4:
cbee7a69 247 case CODEC_ID_AAC:
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248 if (!strcmp(attr, "config")) {
249 /* decode the hexa encoded parameter */
250 int len = hex_to_data(NULL, value);
251 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
252 if (!codec->extradata)
253 return;
254 codec->extradata_size = len;
255 hex_to_data(codec->extradata, value);
256 }
257 break;
258 default:
259 break;
260 }
261 return;
262}
263
264typedef struct attrname_map
265{
7b49ce2e 266 const char *str;
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267 uint16_t type;
268 uint32_t offset;
269} attrname_map_t;
270
271/* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
272#define ATTR_NAME_TYPE_INT 0
273#define ATTR_NAME_TYPE_STR 1
274static attrname_map_t attr_names[]=
275{
276 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, sizelength)},
277 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexlength)},
278 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexdeltalength)},
279 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, profile_level_id)},
280 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, streamtype)},
281 {"mode", ATTR_NAME_TYPE_STR, offsetof(rtp_payload_data_t, mode)},
282 {NULL, -1, -1},
283};
284
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285/** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
286* because it is used in rtp_h264.c, which is forthcoming.
287*/
288int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
289{
290 skip_spaces(p);
291 if(**p)
292 {
293 get_word_sep(attr, attr_size, "=", p);
294 if (**p == '=')
295 (*p)++;
296 get_word_sep(value, value_size, ";", p);
297 if (**p == ';')
298 (*p)++;
299 return 1;
300 }
301 return 0;
302}
303
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304/* parse a SDP line and save stream attributes */
305static void sdp_parse_fmtp(AVStream *st, const char *p)
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306{
307 char attr[256];
308 char value[4096];
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309 int i;
310
311 RTSPStream *rtsp_st = st->priv_data;
01f4895c 312 AVCodecContext *codec = st->codec;
d1ccf0e0 313 rtp_payload_data_t *rtp_payload_data = &rtsp_st->rtp_payload_data;
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314
315 /* loop on each attribute */
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316 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
317 {
bb270c08 318 /* grab the codec extra_data from the config parameter of the fmtp line */
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319 sdp_parse_fmtp_config(codec, attr, value);
320 /* Looking for a known attribute */
321 for (i = 0; attr_names[i].str; ++i) {
322 if (!strcasecmp(attr, attr_names[i].str)) {
323 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
324 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
325 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
326 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
bb270c08 327 }
93ced3e8 328 }
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329 }
330}
331
31693e00
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332/** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
333 * and end time.
334 * Used for seeking in the rtp stream.
335 */
336static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
337{
338 char buf[256];
339
340 skip_spaces(&p);
341 if (!stristart(p, "npt=", &p))
342 return;
343
344 *start = AV_NOPTS_VALUE;
345 *end = AV_NOPTS_VALUE;
346
347 get_word_sep(buf, sizeof(buf), "-", &p);
348 *start = parse_date(buf, 1);
349 if (*p == '-') {
350 p++;
351 get_word_sep(buf, sizeof(buf), "-", &p);
352 *end = parse_date(buf, 1);
353 }
354// av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
355// av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
356}
357
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358typedef struct SDPParseState {
359 /* SDP only */
360 struct in_addr default_ip;
361 int default_ttl;
362} SDPParseState;
363
364static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
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365 int letter, const char *buf)
366{
8b1ab7bf 367 RTSPState *rt = s->priv_data;
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368 char buf1[64], st_type[64];
369 const char *p;
93ced3e8 370 int codec_type, payload_type, i;
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371 AVStream *st;
372 RTSPStream *rtsp_st;
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373 struct in_addr sdp_ip;
374 int ttl;
375
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376#ifdef DEBUG
377 printf("sdp: %c='%s'\n", letter, buf);
378#endif
379
380 p = buf;
381 switch(letter) {
93ced3e8
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382 case 'c':
383 get_word(buf1, sizeof(buf1), &p);
384 if (strcmp(buf1, "IN") != 0)
385 return;
386 get_word(buf1, sizeof(buf1), &p);
387 if (strcmp(buf1, "IP4") != 0)
388 return;
389 get_word_sep(buf1, sizeof(buf1), "/", &p);
390 if (inet_aton(buf1, &sdp_ip) == 0)
391 return;
392 ttl = 16;
393 if (*p == '/') {
394 p++;
395 get_word_sep(buf1, sizeof(buf1), "/", &p);
396 ttl = atoi(buf1);
397 }
398 if (s->nb_streams == 0) {
399 s1->default_ip = sdp_ip;
400 s1->default_ttl = ttl;
401 } else {
402 st = s->streams[s->nb_streams - 1];
403 rtsp_st = st->priv_data;
404 rtsp_st->sdp_ip = sdp_ip;
405 rtsp_st->sdp_ttl = ttl;
406 }
407 break;
1617ad97
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408 case 's':
409 pstrcpy(s->title, sizeof(s->title), p);
410 break;
411 case 'i':
412 if (s->nb_streams == 0) {
413 pstrcpy(s->comment, sizeof(s->comment), p);
414 break;
415 }
416 break;
417 case 'm':
418 /* new stream */
419 get_word(st_type, sizeof(st_type), &p);
420 if (!strcmp(st_type, "audio")) {
421 codec_type = CODEC_TYPE_AUDIO;
422 } else if (!strcmp(st_type, "video")) {
423 codec_type = CODEC_TYPE_VIDEO;
424 } else {
425 return;
426 }
1617ad97
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427 rtsp_st = av_mallocz(sizeof(RTSPStream));
428 if (!rtsp_st)
429 return;
8b1ab7bf
FB
430 rtsp_st->stream_index = -1;
431 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
93ced3e8
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432
433 rtsp_st->sdp_ip = s1->default_ip;
434 rtsp_st->sdp_ttl = s1->default_ttl;
435
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436 get_word(buf1, sizeof(buf1), &p); /* port */
437 rtsp_st->sdp_port = atoi(buf1);
438
439 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
115329f1 440
93ced3e8
FB
441 /* XXX: handle list of formats */
442 get_word(buf1, sizeof(buf1), &p); /* format list */
443 rtsp_st->sdp_payload_type = atoi(buf1);
93ced3e8 444
d1ccf0e0 445 if (!strcmp(AVRtpPayloadTypes[rtsp_st->sdp_payload_type].enc_name, "MP2T")) {
8b1ab7bf
FB
446 /* no corresponding stream */
447 } else {
448 st = av_new_stream(s, 0);
449 if (!st)
450 return;
451 st->priv_data = rtsp_st;
452 rtsp_st->stream_index = st->index;
01f4895c 453 st->codec->codec_type = codec_type;
d1ccf0e0 454 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
8b1ab7bf 455 /* if standard payload type, we can find the codec right now */
01f4895c 456 rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
8b1ab7bf
FB
457 }
458 }
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459 /* put a default control url */
460 pstrcpy(rtsp_st->control_url, sizeof(rtsp_st->control_url), s->filename);
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461 break;
462 case 'a':
463 if (strstart(p, "control:", &p) && s->nb_streams > 0) {
464 char proto[32];
465 /* get the control url */
466 st = s->streams[s->nb_streams - 1];
467 rtsp_st = st->priv_data;
115329f1 468
1617ad97 469 /* XXX: may need to add full url resolution */
6ba5cbc6 470 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
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FB
471 if (proto[0] == '\0') {
472 /* relative control URL */
473 pstrcat(rtsp_st->control_url, sizeof(rtsp_st->control_url), "/");
474 pstrcat(rtsp_st->control_url, sizeof(rtsp_st->control_url), p);
475 } else {
476 pstrcpy(rtsp_st->control_url, sizeof(rtsp_st->control_url), p);
477 }
93ced3e8
FB
478 } else if (strstart(p, "rtpmap:", &p)) {
479 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
115329f1 480 get_word(buf1, sizeof(buf1), &p);
93ced3e8
FB
481 payload_type = atoi(buf1);
482 for(i = 0; i < s->nb_streams;i++) {
483 st = s->streams[i];
484 rtsp_st = st->priv_data;
485 if (rtsp_st->sdp_payload_type == payload_type) {
4934884a 486 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
93ced3e8
FB
487 }
488 }
489 } else if (strstart(p, "fmtp:", &p)) {
490 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
115329f1 491 get_word(buf1, sizeof(buf1), &p);
93ced3e8
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492 payload_type = atoi(buf1);
493 for(i = 0; i < s->nb_streams;i++) {
494 st = s->streams[i];
495 rtsp_st = st->priv_data;
496 if (rtsp_st->sdp_payload_type == payload_type) {
4934884a
RM
497 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
498 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf)) {
499 sdp_parse_fmtp(st, p);
500 }
501 } else {
ed787542 502 sdp_parse_fmtp(st, p);
4934884a 503 }
93ced3e8
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504 }
505 }
d0deedcb
RM
506 } else if(strstart(p, "framesize:", &p)) {
507 // let dynamic protocol handlers have a stab at the line.
508 get_word(buf1, sizeof(buf1), &p);
509 payload_type = atoi(buf1);
510 for(i = 0; i < s->nb_streams;i++) {
511 st = s->streams[i];
512 rtsp_st = st->priv_data;
513 if (rtsp_st->sdp_payload_type == payload_type) {
514 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
515 rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf);
516 }
517 }
518 }
31693e00
RM
519 } else if(strstart(p, "range:", &p)) {
520 int64_t start, end;
521
522 // this is so that seeking on a streamed file can work.
523 rtsp_parse_range_npt(p, &start, &end);
524 s->start_time= start;
525 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
1617ad97
FB
526 }
527 break;
528 }
529}
530
5c91a675 531static int sdp_parse(AVFormatContext *s, const char *content)
1617ad97
FB
532{
533 const char *p;
534 int letter;
535 char buf[1024], *q;
93ced3e8 536 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
115329f1 537
93ced3e8 538 memset(s1, 0, sizeof(SDPParseState));
1617ad97
FB
539 p = content;
540 for(;;) {
541 skip_spaces(&p);
542 letter = *p;
543 if (letter == '\0')
544 break;
545 p++;
546 if (*p != '=')
547 goto next_line;
548 p++;
549 /* get the content */
550 q = buf;
b6892136 551 while (*p != '\n' && *p != '\r' && *p != '\0') {
1617ad97
FB
552 if ((q - buf) < sizeof(buf) - 1)
553 *q++ = *p;
554 p++;
555 }
556 *q = '\0';
93ced3e8 557 sdp_parse_line(s, s1, letter, buf);
1617ad97
FB
558 next_line:
559 while (*p != '\n' && *p != '\0')
560 p++;
561 if (*p == '\n')
562 p++;
563 }
564 return 0;
565}
566
567static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
568{
569 const char *p;
570 int v;
571
572 p = *pp;
573 skip_spaces(&p);
574 v = strtol(p, (char **)&p, 10);
575 if (*p == '-') {
576 p++;
577 *min_ptr = v;
578 v = strtol(p, (char **)&p, 10);
579 *max_ptr = v;
580 } else {
581 *min_ptr = v;
582 *max_ptr = v;
583 }
584 *pp = p;
585}
586
587/* XXX: only one transport specification is parsed */
588static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
589{
590 char transport_protocol[16];
591 char profile[16];
592 char lower_transport[16];
593 char parameter[16];
594 RTSPTransportField *th;
595 char buf[256];
115329f1 596
1617ad97 597 reply->nb_transports = 0;
115329f1 598
1617ad97
FB
599 for(;;) {
600 skip_spaces(&p);
601 if (*p == '\0')
602 break;
603
604 th = &reply->transports[reply->nb_transports];
605
115329f1 606 get_word_sep(transport_protocol, sizeof(transport_protocol),
1617ad97
FB
607 "/", &p);
608 if (*p == '/')
609 p++;
610 get_word_sep(profile, sizeof(profile), "/;,", &p);
611 lower_transport[0] = '\0';
612 if (*p == '/') {
b6892136 613 p++;
115329f1 614 get_word_sep(lower_transport, sizeof(lower_transport),
1617ad97
FB
615 ";,", &p);
616 }
b6892136 617 if (!strcasecmp(lower_transport, "TCP"))
1617ad97
FB
618 th->protocol = RTSP_PROTOCOL_RTP_TCP;
619 else
620 th->protocol = RTSP_PROTOCOL_RTP_UDP;
115329f1 621
1617ad97
FB
622 if (*p == ';')
623 p++;
624 /* get each parameter */
625 while (*p != '\0' && *p != ',') {
626 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
627 if (!strcmp(parameter, "port")) {
628 if (*p == '=') {
629 p++;
630 rtsp_parse_range(&th->port_min, &th->port_max, &p);
631 }
632 } else if (!strcmp(parameter, "client_port")) {
633 if (*p == '=') {
634 p++;
115329f1 635 rtsp_parse_range(&th->client_port_min,
1617ad97
FB
636 &th->client_port_max, &p);
637 }
638 } else if (!strcmp(parameter, "server_port")) {
639 if (*p == '=') {
640 p++;
115329f1 641 rtsp_parse_range(&th->server_port_min,
1617ad97
FB
642 &th->server_port_max, &p);
643 }
644 } else if (!strcmp(parameter, "interleaved")) {
645 if (*p == '=') {
646 p++;
115329f1 647 rtsp_parse_range(&th->interleaved_min,
1617ad97
FB
648 &th->interleaved_max, &p);
649 }
650 } else if (!strcmp(parameter, "multicast")) {
651 if (th->protocol == RTSP_PROTOCOL_RTP_UDP)
652 th->protocol = RTSP_PROTOCOL_RTP_UDP_MULTICAST;
653 } else if (!strcmp(parameter, "ttl")) {
654 if (*p == '=') {
655 p++;
656 th->ttl = strtol(p, (char **)&p, 10);
657 }
658 } else if (!strcmp(parameter, "destination")) {
659 struct in_addr ipaddr;
660
661 if (*p == '=') {
662 p++;
663 get_word_sep(buf, sizeof(buf), ";,", &p);
115329f1 664 if (inet_aton(buf, &ipaddr))
1617ad97
FB
665 th->destination = ntohl(ipaddr.s_addr);
666 }
667 }
668 while (*p != ';' && *p != '\0' && *p != ',')
669 p++;
670 if (*p == ';')
671 p++;
672 }
673 if (*p == ',')
674 p++;
675
676 reply->nb_transports++;
677 }
678}
679
680void rtsp_parse_line(RTSPHeader *reply, const char *buf)
681{
682 const char *p;
683
684 /* NOTE: we do case independent match for broken servers */
685 p = buf;
686 if (stristart(p, "Session:", &p)) {
687 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
688 } else if (stristart(p, "Content-Length:", &p)) {
689 reply->content_length = strtol(p, NULL, 10);
690 } else if (stristart(p, "Transport:", &p)) {
691 rtsp_parse_transport(reply, p);
692 } else if (stristart(p, "CSeq:", &p)) {
693 reply->seq = strtol(p, NULL, 10);
ff762d6e 694 } else if (stristart(p, "Range:", &p)) {
31693e00 695 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
1617ad97
FB
696 }
697}
698
2a42b5c3
LS
699static int url_readbuf(URLContext *h, unsigned char *buf, int size)
700{
701 int ret, len;
702
703 len = 0;
704 while (len < size) {
705 ret = url_read(h, buf+len, size-len);
706 if (ret < 1)
707 return ret;
708 len += ret;
709 }
710 return len;
711}
712
b7b8fc34
FB
713/* skip a RTP/TCP interleaved packet */
714static void rtsp_skip_packet(AVFormatContext *s)
715{
716 RTSPState *rt = s->priv_data;
717 int ret, len, len1;
718 uint8_t buf[1024];
719
2a42b5c3 720 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b7b8fc34
FB
721 if (ret != 3)
722 return;
723 len = (buf[1] << 8) | buf[2];
724#ifdef DEBUG
725 printf("skipping RTP packet len=%d\n", len);
726#endif
727 /* skip payload */
728 while (len > 0) {
729 len1 = len;
730 if (len1 > sizeof(buf))
731 len1 = sizeof(buf);
2a42b5c3 732 ret = url_readbuf(rt->rtsp_hd, buf, len1);
b7b8fc34
FB
733 if (ret != len1)
734 return;
735 len -= len1;
736 }
737}
1617ad97 738
115329f1
DB
739static void rtsp_send_cmd(AVFormatContext *s,
740 const char *cmd, RTSPHeader *reply,
1617ad97
FB
741 unsigned char **content_ptr)
742{
743 RTSPState *rt = s->priv_data;
744 char buf[4096], buf1[1024], *q;
745 unsigned char ch;
746 const char *p;
747 int content_length, line_count;
748 unsigned char *content = NULL;
749
750 memset(reply, 0, sizeof(RTSPHeader));
751
752 rt->seq++;
753 pstrcpy(buf, sizeof(buf), cmd);
b6892136 754 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
1617ad97
FB
755 pstrcat(buf, sizeof(buf), buf1);
756 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
b6892136 757 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
1617ad97
FB
758 pstrcat(buf, sizeof(buf), buf1);
759 }
b6892136 760 pstrcat(buf, sizeof(buf), "\r\n");
1617ad97
FB
761#ifdef DEBUG
762 printf("Sending:\n%s--\n", buf);
763#endif
764 url_write(rt->rtsp_hd, buf, strlen(buf));
765
766 /* parse reply (XXX: use buffers) */
767 line_count = 0;
768 rt->last_reply[0] = '\0';
769 for(;;) {
770 q = buf;
771 for(;;) {
2a42b5c3 772 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
1617ad97
FB
773 break;
774 if (ch == '\n')
775 break;
b7b8fc34
FB
776 if (ch == '$') {
777 /* XXX: only parse it if first char on line ? */
778 rtsp_skip_packet(s);
779 } else if (ch != '\r') {
1617ad97
FB
780 if ((q - buf) < sizeof(buf) - 1)
781 *q++ = ch;
782 }
783 }
784 *q = '\0';
785#ifdef DEBUG
786 printf("line='%s'\n", buf);
787#endif
788 /* test if last line */
789 if (buf[0] == '\0')
790 break;
791 p = buf;
792 if (line_count == 0) {
793 /* get reply code */
794 get_word(buf1, sizeof(buf1), &p);
795 get_word(buf1, sizeof(buf1), &p);
796 reply->status_code = atoi(buf1);
797 } else {
798 rtsp_parse_line(reply, p);
799 pstrcat(rt->last_reply, sizeof(rt->last_reply), p);
800 pstrcat(rt->last_reply, sizeof(rt->last_reply), "\n");
801 }
802 line_count++;
803 }
115329f1 804
1617ad97
FB
805 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
806 pstrcpy(rt->session_id, sizeof(rt->session_id), reply->session_id);
115329f1 807
1617ad97
FB
808 content_length = reply->content_length;
809 if (content_length > 0) {
810 /* leave some room for a trailing '\0' (useful for simple parsing) */
811 content = av_malloc(content_length + 1);
2a42b5c3 812 (void)url_readbuf(rt->rtsp_hd, content, content_length);
1617ad97
FB
813 content[content_length] = '\0';
814 }
815 if (content_ptr)
816 *content_ptr = content;
817}
818
819/* useful for modules: set RTSP callback function */
820
821void rtsp_set_callback(FFRTSPCallback *rtsp_cb)
822{
823 ff_rtsp_callback = rtsp_cb;
824}
825
826
8b1ab7bf
FB
827/* close and free RTSP streams */
828static void rtsp_close_streams(RTSPState *rt)
829{
830 int i;
831 RTSPStream *rtsp_st;
832
833 for(i=0;i<rt->nb_rtsp_streams;i++) {
834 rtsp_st = rt->rtsp_streams[i];
835 if (rtsp_st) {
836 if (rtsp_st->rtp_ctx)
837 rtp_parse_close(rtsp_st->rtp_ctx);
838 if (rtsp_st->rtp_handle)
839 url_close(rtsp_st->rtp_handle);
4934884a
RM
840 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
841 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
8b1ab7bf
FB
842 }
843 av_free(rtsp_st);
844 }
845 av_free(rt->rtsp_streams);
846}
847
1617ad97
FB
848static int rtsp_read_header(AVFormatContext *s,
849 AVFormatParameters *ap)
850{
851 RTSPState *rt = s->priv_data;
852 char host[1024], path[1024], tcpname[1024], cmd[2048];
853 URLContext *rtsp_hd;
d1ccf0e0 854 int port, i, j, ret, err;
1617ad97
FB
855 RTSPHeader reply1, *reply = &reply1;
856 unsigned char *content = NULL;
1617ad97
FB
857 RTSPStream *rtsp_st;
858 int protocol_mask;
8b1ab7bf 859 AVStream *st;
1617ad97 860
1617ad97 861 /* extract hostname and port */
6ba5cbc6 862 url_split(NULL, 0, NULL, 0,
1617ad97
FB
863 host, sizeof(host), &port, path, sizeof(path), s->filename);
864 if (port < 0)
865 port = RTSP_DEFAULT_PORT;
866
867 /* open the tcp connexion */
868 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
869 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
870 return AVERROR_IO;
871 rt->rtsp_hd = rtsp_hd;
872 rt->seq = 0;
115329f1 873
1617ad97 874 /* describe the stream */
115329f1 875 snprintf(cmd, sizeof(cmd),
b6892136
FB
876 "DESCRIBE %s RTSP/1.0\r\n"
877 "Accept: application/sdp\r\n",
1617ad97
FB
878 s->filename);
879 rtsp_send_cmd(s, cmd, reply, &content);
880 if (!content) {
881 err = AVERROR_INVALIDDATA;
882 goto fail;
883 }
884 if (reply->status_code != RTSP_STATUS_OK) {
885 err = AVERROR_INVALIDDATA;
886 goto fail;
887 }
115329f1 888
1617ad97
FB
889 /* now we got the SDP description, we parse it */
890 ret = sdp_parse(s, (const char *)content);
891 av_freep(&content);
892 if (ret < 0) {
893 err = AVERROR_INVALIDDATA;
894 goto fail;
895 }
115329f1 896
1617ad97
FB
897 protocol_mask = rtsp_default_protocols;
898
899 /* for each stream, make the setup request */
900 /* XXX: we assume the same server is used for the control of each
901 RTSP stream */
d1ccf0e0
RD
902
903 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1617ad97
FB
904 char transport[2048];
905
8b1ab7bf 906 rtsp_st = rt->rtsp_streams[i];
1617ad97
FB
907
908 /* compute available transports */
909 transport[0] = '\0';
910
911 /* RTP/UDP */
912 if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP)) {
85fb7b34 913 char buf[256];
85fb7b34
FB
914
915 /* first try in specified port range */
d1ccf0e0
RD
916 if (RTSP_RTP_PORT_MIN != 0) {
917 while(j <= RTSP_RTP_PORT_MAX) {
85fb7b34 918 snprintf(buf, sizeof(buf), "rtp://?localport=%d", j);
dbf30963 919 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
d1ccf0e0 920 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
85fb7b34 921 goto rtp_opened;
d1ccf0e0 922 }
85fb7b34 923 }
1617ad97 924 }
85fb7b34 925
d1ccf0e0
RD
926/* then try on any port
927** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
928** err = AVERROR_INVALIDDATA;
929** goto fail;
930** }
931*/
85fb7b34
FB
932
933 rtp_opened:
8b1ab7bf 934 port = rtp_get_local_port(rtsp_st->rtp_handle);
1617ad97
FB
935 if (transport[0] != '\0')
936 pstrcat(transport, sizeof(transport), ",");
937 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
938 "RTP/AVP/UDP;unicast;client_port=%d-%d",
939 port, port + 1);
940 }
941
942 /* RTP/TCP */
d1ccf0e0 943 else if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_TCP)) {
1617ad97
FB
944 if (transport[0] != '\0')
945 pstrcat(transport, sizeof(transport), ",");
946 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
947 "RTP/AVP/TCP");
948 }
949
d1ccf0e0 950 else if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP_MULTICAST)) {
1617ad97
FB
951 if (transport[0] != '\0')
952 pstrcat(transport, sizeof(transport), ",");
115329f1 953 snprintf(transport + strlen(transport),
1617ad97
FB
954 sizeof(transport) - strlen(transport) - 1,
955 "RTP/AVP/UDP;multicast");
956 }
115329f1 957 snprintf(cmd, sizeof(cmd),
b6892136
FB
958 "SETUP %s RTSP/1.0\r\n"
959 "Transport: %s\r\n",
1617ad97
FB
960 rtsp_st->control_url, transport);
961 rtsp_send_cmd(s, cmd, reply, NULL);
962 if (reply->status_code != RTSP_STATUS_OK ||
963 reply->nb_transports != 1) {
964 err = AVERROR_INVALIDDATA;
965 goto fail;
966 }
967
968 /* XXX: same protocol for all streams is required */
969 if (i > 0) {
970 if (reply->transports[0].protocol != rt->protocol) {
971 err = AVERROR_INVALIDDATA;
972 goto fail;
973 }
974 } else {
975 rt->protocol = reply->transports[0].protocol;
976 }
977
978 /* close RTP connection if not choosen */
979 if (reply->transports[0].protocol != RTSP_PROTOCOL_RTP_UDP &&
980 (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP))) {
8b1ab7bf
FB
981 url_close(rtsp_st->rtp_handle);
982 rtsp_st->rtp_handle = NULL;
1617ad97
FB
983 }
984
985 switch(reply->transports[0].protocol) {
986 case RTSP_PROTOCOL_RTP_TCP:
1617ad97
FB
987 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
988 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
989 break;
115329f1 990
1617ad97
FB
991 case RTSP_PROTOCOL_RTP_UDP:
992 {
993 char url[1024];
115329f1 994
1617ad97 995 /* XXX: also use address if specified */
115329f1 996 snprintf(url, sizeof(url), "rtp://%s:%d",
1617ad97 997 host, reply->transports[0].server_port_min);
8b1ab7bf 998 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1617ad97
FB
999 err = AVERROR_INVALIDDATA;
1000 goto fail;
1001 }
1002 }
1003 break;
1004 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1005 {
1006 char url[1024];
1007 int ttl;
1008
1617ad97
FB
1009 ttl = reply->transports[0].ttl;
1010 if (!ttl)
1011 ttl = 16;
115329f1
DB
1012 snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
1013 host,
1617ad97
FB
1014 reply->transports[0].server_port_min,
1015 ttl);
dbf30963 1016 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1617ad97
FB
1017 err = AVERROR_INVALIDDATA;
1018 goto fail;
1019 }
1020 }
1021 break;
1022 }
8b1ab7bf
FB
1023 /* open the RTP context */
1024 st = NULL;
1025 if (rtsp_st->stream_index >= 0)
1026 st = s->streams[rtsp_st->stream_index];
1027 if (!st)
1028 s->ctx_flags |= AVFMTCTX_NOHEADER;
dbf30963 1029 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
d1ccf0e0 1030
8b1ab7bf
FB
1031 if (!rtsp_st->rtp_ctx) {
1032 err = AVERROR_NOMEM;
1033 goto fail;
4934884a
RM
1034 } else {
1035 if(rtsp_st->dynamic_handler) {
1036 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1037 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1038 }
8b1ab7bf 1039 }
1617ad97
FB
1040 }
1041
1042 /* use callback if available to extend setup */
1043 if (ff_rtsp_callback) {
115329f1 1044 if (ff_rtsp_callback(RTSP_ACTION_CLIENT_SETUP, rt->session_id,
1617ad97
FB
1045 NULL, 0, rt->last_reply) < 0) {
1046 err = AVERROR_INVALIDDATA;
1047 goto fail;
1048 }
1049 }
115329f1 1050
1617ad97 1051
ff762d6e
FB
1052 rt->state = RTSP_STATE_IDLE;
1053 rt->seek_timestamp = 0; /* default is to start stream at position
1054 zero */
c04c3282 1055 if (ap->initial_pause) {
ff762d6e
FB
1056 /* do not start immediately */
1057 } else {
1058 if (rtsp_read_play(s) < 0) {
1059 err = AVERROR_INVALIDDATA;
1617ad97
FB
1060 goto fail;
1061 }
1062 }
1617ad97
FB
1063 return 0;
1064 fail:
8b1ab7bf 1065 rtsp_close_streams(rt);
1617ad97
FB
1066 av_freep(&content);
1067 url_close(rt->rtsp_hd);
1068 return err;
1069}
1070
8b1ab7bf
FB
1071static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1072 uint8_t *buf, int buf_size)
1617ad97
FB
1073{
1074 RTSPState *rt = s->priv_data;
b6892136 1075 int id, len, i, ret;
1617ad97 1076 RTSPStream *rtsp_st;
1617ad97 1077
b6892136
FB
1078#ifdef DEBUG_RTP_TCP
1079 printf("tcp_read_packet:\n");
1080#endif
1617ad97
FB
1081 redo:
1082 for(;;) {
2a42b5c3 1083 ret = url_readbuf(rt->rtsp_hd, buf, 1);
b6892136
FB
1084#ifdef DEBUG_RTP_TCP
1085 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1086#endif
1087 if (ret != 1)
8b1ab7bf 1088 return -1;
b6892136 1089 if (buf[0] == '$')
1617ad97
FB
1090 break;
1091 }
2a42b5c3 1092 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b6892136 1093 if (ret != 3)
8b1ab7bf 1094 return -1;
b6892136
FB
1095 id = buf[0];
1096 len = (buf[1] << 8) | buf[2];
1097#ifdef DEBUG_RTP_TCP
1098 printf("id=%d len=%d\n", id, len);
1099#endif
8b1ab7bf 1100 if (len > buf_size || len < 12)
1617ad97
FB
1101 goto redo;
1102 /* get the data */
2a42b5c3 1103 ret = url_readbuf(rt->rtsp_hd, buf, len);
b6892136 1104 if (ret != len)
8b1ab7bf 1105 return -1;
115329f1 1106
1617ad97 1107 /* find the matching stream */
8b1ab7bf
FB
1108 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1109 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1110 if (id >= rtsp_st->interleaved_min &&
1111 id <= rtsp_st->interleaved_max)
1617ad97
FB
1112 goto found;
1113 }
1114 goto redo;
1115 found:
8b1ab7bf
FB
1116 *prtsp_st = rtsp_st;
1117 return len;
1617ad97
FB
1118}
1119
115329f1 1120static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
8b1ab7bf 1121 uint8_t *buf, int buf_size)
1617ad97 1122{
8b1ab7bf 1123 RTSPState *rt = s->priv_data;
1617ad97
FB
1124 RTSPStream *rtsp_st;
1125 fd_set rfds;
1126 int fd1, fd2, fd_max, n, i, ret;
1617ad97
FB
1127 struct timeval tv;
1128
1129 for(;;) {
b7b8fc34 1130 if (url_interrupt_cb())
8b1ab7bf 1131 return -1;
1617ad97
FB
1132 FD_ZERO(&rfds);
1133 fd_max = -1;
8b1ab7bf
FB
1134 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1135 rtsp_st = rt->rtsp_streams[i];
1617ad97 1136 /* currently, we cannot probe RTCP handle because of blocking restrictions */
8b1ab7bf 1137 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97
FB
1138 if (fd1 > fd_max)
1139 fd_max = fd1;
1140 FD_SET(fd1, &rfds);
1141 }
1617ad97 1142 tv.tv_sec = 0;
b7b8fc34 1143 tv.tv_usec = 100 * 1000;
1617ad97
FB
1144 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1145 if (n > 0) {
8b1ab7bf
FB
1146 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1147 rtsp_st = rt->rtsp_streams[i];
1148 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97 1149 if (FD_ISSET(fd1, &rfds)) {
8b1ab7bf
FB
1150 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1151 if (ret > 0) {
1152 *prtsp_st = rtsp_st;
1617ad97
FB
1153 return ret;
1154 }
1155 }
1156 }
1157 }
1158 }
1159}
1160
1161static int rtsp_read_packet(AVFormatContext *s,
1162 AVPacket *pkt)
1163{
1164 RTSPState *rt = s->priv_data;
8b1ab7bf
FB
1165 RTSPStream *rtsp_st;
1166 int ret, len;
1167 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1168
1169 /* get next frames from the same RTP packet */
1170 if (rt->cur_rtp) {
1171 ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1172 if (ret == 0) {
1173 rt->cur_rtp = NULL;
1174 return 0;
1175 } else if (ret == 1) {
1176 return 0;
1177 } else {
1178 rt->cur_rtp = NULL;
1179 }
1180 }
1617ad97 1181
8b1ab7bf
FB
1182 /* read next RTP packet */
1183 redo:
1617ad97
FB
1184 switch(rt->protocol) {
1185 default:
1186 case RTSP_PROTOCOL_RTP_TCP:
8b1ab7bf 1187 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1617ad97
FB
1188 break;
1189 case RTSP_PROTOCOL_RTP_UDP:
8b1ab7bf
FB
1190 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1191 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
dbf30963
T
1192 if (rtsp_st->rtp_ctx)
1193 rtp_check_and_send_back_rr(rtsp_st->rtp_ctx, len);
1617ad97
FB
1194 break;
1195 }
8b1ab7bf
FB
1196 if (len < 0)
1197 return AVERROR_IO;
1198 ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1199 if (ret < 0)
1200 goto redo;
1201 if (ret == 1) {
1202 /* more packets may follow, so we save the RTP context */
1203 rt->cur_rtp = rtsp_st->rtp_ctx;
1204 }
1205 return 0;
1617ad97
FB
1206}
1207
ff762d6e 1208static int rtsp_read_play(AVFormatContext *s)
b7b8fc34 1209{
ff762d6e 1210 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1211 RTSPHeader reply1, *reply = &reply1;
1212 char cmd[1024];
1213
bc874dae 1214 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
ff762d6e
FB
1215
1216 if (rt->state == RTSP_STATE_PAUSED) {
115329f1 1217 snprintf(cmd, sizeof(cmd),
ff762d6e
FB
1218 "PLAY %s RTSP/1.0\r\n",
1219 s->filename);
1220 } else {
115329f1 1221 snprintf(cmd, sizeof(cmd),
ff762d6e
FB
1222 "PLAY %s RTSP/1.0\r\n"
1223 "Range: npt=%0.3f-\r\n",
1224 s->filename,
1225 (double)rt->seek_timestamp / AV_TIME_BASE);
1226 }
b7b8fc34
FB
1227 rtsp_send_cmd(s, cmd, reply, NULL);
1228 if (reply->status_code != RTSP_STATUS_OK) {
1229 return -1;
1230 } else {
ff762d6e 1231 rt->state = RTSP_STATE_PLAYING;
b7b8fc34
FB
1232 return 0;
1233 }
1234}
1235
ff762d6e
FB
1236/* pause the stream */
1237static int rtsp_read_pause(AVFormatContext *s)
b7b8fc34 1238{
ff762d6e 1239 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1240 RTSPHeader reply1, *reply = &reply1;
1241 char cmd[1024];
1242
b7b8fc34 1243 rt = s->priv_data;
115329f1 1244
ff762d6e
FB
1245 if (rt->state != RTSP_STATE_PLAYING)
1246 return 0;
1247
115329f1 1248 snprintf(cmd, sizeof(cmd),
ff762d6e 1249 "PAUSE %s RTSP/1.0\r\n",
b7b8fc34
FB
1250 s->filename);
1251 rtsp_send_cmd(s, cmd, reply, NULL);
1252 if (reply->status_code != RTSP_STATUS_OK) {
1253 return -1;
1254 } else {
ff762d6e 1255 rt->state = RTSP_STATE_PAUSED;
b7b8fc34
FB
1256 return 0;
1257 }
1258}
1259
115329f1 1260static int rtsp_read_seek(AVFormatContext *s, int stream_index,
7b3c1382 1261 int64_t timestamp, int flags)
ff762d6e
FB
1262{
1263 RTSPState *rt = s->priv_data;
115329f1 1264
ff762d6e
FB
1265 rt->seek_timestamp = timestamp;
1266 switch(rt->state) {
1267 default:
1268 case RTSP_STATE_IDLE:
1269 break;
1270 case RTSP_STATE_PLAYING:
1271 if (rtsp_read_play(s) != 0)
1272 return -1;
1273 break;
1274 case RTSP_STATE_PAUSED:
1275 rt->state = RTSP_STATE_IDLE;
1276 break;
1277 }
1278 return 0;
1279}
1280
1617ad97
FB
1281static int rtsp_read_close(AVFormatContext *s)
1282{
1283 RTSPState *rt = s->priv_data;
1617ad97 1284 RTSPHeader reply1, *reply = &reply1;
1617ad97
FB
1285 char cmd[1024];
1286
b6892136 1287#if 0
1617ad97
FB
1288 /* NOTE: it is valid to flush the buffer here */
1289 if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) {
1290 url_fclose(&rt->rtsp_gb);
1291 }
b6892136 1292#endif
115329f1 1293 snprintf(cmd, sizeof(cmd),
b6892136 1294 "TEARDOWN %s RTSP/1.0\r\n",
1617ad97
FB
1295 s->filename);
1296 rtsp_send_cmd(s, cmd, reply, NULL);
1297
1298 if (ff_rtsp_callback) {
115329f1 1299 ff_rtsp_callback(RTSP_ACTION_CLIENT_TEARDOWN, rt->session_id,
1617ad97
FB
1300 NULL, 0, NULL);
1301 }
1302
8b1ab7bf 1303 rtsp_close_streams(rt);
1617ad97
FB
1304 url_close(rt->rtsp_hd);
1305 return 0;
1306}
1307
d2a067d1 1308AVInputFormat rtsp_demuxer = {
1617ad97
FB
1309 "rtsp",
1310 "RTSP input format",
1311 sizeof(RTSPState),
1312 rtsp_probe,
1313 rtsp_read_header,
1314 rtsp_read_packet,
1315 rtsp_read_close,
ff762d6e 1316 rtsp_read_seek,
bb76a117 1317 .flags = AVFMT_NOFILE,
ff762d6e
FB
1318 .read_play = rtsp_read_play,
1319 .read_pause = rtsp_read_pause,
1617ad97
FB
1320};
1321
cb1fdc61 1322static int sdp_probe(AVProbeData *p1)
93ced3e8 1323{
0e1ceacd 1324 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
cb1fdc61
FB
1325
1326 /* we look for a line beginning "c=IN IP4" */
0e1ceacd
MN
1327 while (p < p_end && *p != '\0') {
1328 if (p + sizeof("c=IN IP4") - 1 < p_end && strstart(p, "c=IN IP4", NULL))
cb1fdc61 1329 return AVPROBE_SCORE_MAX / 2;
0e1ceacd
MN
1330
1331 while(p < p_end - 1 && *p != '\n') p++;
1332 if (++p >= p_end)
cb1fdc61 1333 break;
cb1fdc61
FB
1334 if (*p == '\r')
1335 p++;
1336 }
93ced3e8
FB
1337 return 0;
1338}
1339
1340#define SDP_MAX_SIZE 8192
1341
1342static int sdp_read_header(AVFormatContext *s,
1343 AVFormatParameters *ap)
1344{
8b1ab7bf 1345 RTSPState *rt = s->priv_data;
93ced3e8
FB
1346 RTSPStream *rtsp_st;
1347 int size, i, err;
1348 char *content;
1349 char url[1024];
8b1ab7bf 1350 AVStream *st;
93ced3e8
FB
1351
1352 /* read the whole sdp file */
1353 /* XXX: better loading */
1354 content = av_malloc(SDP_MAX_SIZE);
1355 size = get_buffer(&s->pb, content, SDP_MAX_SIZE - 1);
1356 if (size <= 0) {
1357 av_free(content);
1358 return AVERROR_INVALIDDATA;
1359 }
1360 content[size] ='\0';
1361
1362 sdp_parse(s, content);
1363 av_free(content);
1364
1365 /* open each RTP stream */
8b1ab7bf
FB
1366 for(i=0;i<rt->nb_rtsp_streams;i++) {
1367 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1368
1369 snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
1370 inet_ntoa(rtsp_st->sdp_ip),
93ced3e8
FB
1371 rtsp_st->sdp_port,
1372 rtsp_st->sdp_ttl);
dbf30963 1373 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
93ced3e8
FB
1374 err = AVERROR_INVALIDDATA;
1375 goto fail;
1376 }
8b1ab7bf
FB
1377 /* open the RTP context */
1378 st = NULL;
1379 if (rtsp_st->stream_index >= 0)
1380 st = s->streams[rtsp_st->stream_index];
1381 if (!st)
1382 s->ctx_flags |= AVFMTCTX_NOHEADER;
dbf30963 1383 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
8b1ab7bf
FB
1384 if (!rtsp_st->rtp_ctx) {
1385 err = AVERROR_NOMEM;
1386 goto fail;
4934884a
RM
1387 } else {
1388 if(rtsp_st->dynamic_handler) {
1389 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1390 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1391 }
8b1ab7bf 1392 }
93ced3e8
FB
1393 }
1394 return 0;
1395 fail:
8b1ab7bf 1396 rtsp_close_streams(rt);
93ced3e8
FB
1397 return err;
1398}
1399
1400static int sdp_read_packet(AVFormatContext *s,
1401 AVPacket *pkt)
1402{
8b1ab7bf 1403 return rtsp_read_packet(s, pkt);
93ced3e8
FB
1404}
1405
1406static int sdp_read_close(AVFormatContext *s)
1407{
8b1ab7bf
FB
1408 RTSPState *rt = s->priv_data;
1409 rtsp_close_streams(rt);
93ced3e8
FB
1410 return 0;
1411}
1412
ff70e601
MR
1413#ifdef CONFIG_SDP_DEMUXER
1414AVInputFormat sdp_demuxer = {
93ced3e8
FB
1415 "sdp",
1416 "SDP",
1417 sizeof(RTSPState),
1418 sdp_probe,
1419 sdp_read_header,
1420 sdp_read_packet,
1421 sdp_read_close,
1422};
ff70e601 1423#endif
93ced3e8 1424
1617ad97
FB
1425/* dummy redirector format (used directly in av_open_input_file now) */
1426static int redir_probe(AVProbeData *pd)
1427{
1428 const char *p;
1429 p = pd->buf;
1430 while (redir_isspace(*p))
1431 p++;
1432 if (strstart(p, "http://", NULL) ||
1433 strstart(p, "rtsp://", NULL))
1434 return AVPROBE_SCORE_MAX;
1435 return 0;
1436}
1437
1438/* called from utils.c */
1439int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f)
1440{
1441 char buf[4096], *q;
1442 int c;
1443 AVFormatContext *ic = NULL;
1444
1445 /* parse each URL and try to open it */
1446 c = url_fgetc(f);
1447 while (c != URL_EOF) {
1448 /* skip spaces */
1449 for(;;) {
1450 if (!redir_isspace(c))
1451 break;
1452 c = url_fgetc(f);
1453 }
1454 if (c == URL_EOF)
1455 break;
1456 /* record url */
1457 q = buf;
1458 for(;;) {
1459 if (c == URL_EOF || redir_isspace(c))
1460 break;
1461 if ((q - buf) < sizeof(buf) - 1)
1462 *q++ = c;
1463 c = url_fgetc(f);
1464 }
1465 *q = '\0';
1466 //printf("URL='%s'\n", buf);
1467 /* try to open the media file */
1468 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1469 break;
1470 }
1471 *ic_ptr = ic;
1472 if (!ic)
1473 return AVERROR_IO;
1474 else
1475 return 0;
1476}
1477
d2a067d1 1478AVInputFormat redir_demuxer = {
1617ad97
FB
1479 "redir",
1480 "Redirector format",
1481 0,
1482 redir_probe,
1483 NULL,
1484 NULL,
1485 NULL,
1486};